string/test-strchr.c

   1 /* Test and measure STRCHR functions.
   2    Copyright (C) 1999-2013 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Written by Jakub Jelinek <jakub@redhat.com>, 1999.
   5    Added wcschr support by Liubov Dmitrieva <liubov.dmitrieva@gmail.com>, 2011
   6
   7    The GNU C Library is free software; you can redistribute it and/or
   8    modify it under the terms of the GNU Lesser General Public
   9    License as published by the Free Software Foundation; either
  10    version 2.1 of the License, or (at your option) any later version.
  11
  12    The GNU C Library is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15    Lesser General Public License for more details.
  16
  17    You should have received a copy of the GNU Lesser General Public
  18    License along with the GNU C Library; if not, see
  19    <http://www.gnu.org/licenses/>.  */
  20
  21 #define TEST_MAIN
  22 #ifndef WIDE
  23 # ifdef USE_FOR_STRCHRNUL
  24 #  define TEST_NAME "strchrnul"
  25 # else
  26 #  define TEST_NAME "strchr"
  27 # endif
  28 #else
  29 # define TEST_NAME "wcschr"
  30 #endif
  31 #include "test-string.h"
  32
  33 #ifndef WIDE
  34 # ifdef USE_FOR_STRCHRNUL
  35 #  define STRCHR strchrnul
  36 #  define stupid_STRCHR stupid_STRCHRNUL
  37 #  define simple_STRCHR simple_STRCHRNUL
  38 # else
  39 #  define STRCHR strchr
  40 # endif
  41 # define STRLEN strlen
  42 # define CHAR char
  43 # define BIG_CHAR CHAR_MAX
  44 # define MIDDLE_CHAR 127
  45 # define SMALL_CHAR 23
  46 # define UCHAR unsigned char
  47 #else
  48 # include <wchar.h>
  49 # define STRCHR wcschr
  50 # define STRLEN wcslen
  51 # define CHAR wchar_t
  52 # define BIG_CHAR WCHAR_MAX
  53 # define MIDDLE_CHAR 1121
  54 # define SMALL_CHAR 851
  55 # define UCHAR wchar_t
  56 #endif
  57
  58 #ifdef USE_FOR_STRCHRNUL
  59 # define NULLRET(endptr) endptr
  60 #else
  61 # define NULLRET(endptr) NULL
  62 #endif
  63
  64
  65 typedef CHAR *(*proto_t) (const CHAR *, int);
  66
  67 CHAR *
  68 simple_STRCHR (const CHAR *s, int c)
  69 {
  70   for (; *s != (CHAR) c; ++s)
  71     if (*s == '\0')
  72       return NULLRET ((CHAR *) s);
  73   return (CHAR *) s;
  74 }
  75
  76 CHAR *
  77 stupid_STRCHR (const CHAR *s, int c)
  78 {
  79   size_t n = STRLEN (s) + 1;
  80
  81   while (n--)
  82     if (*s++ == (CHAR) c)
  83       return (CHAR *) s - 1;
  84   return NULLRET ((CHAR *) s - 1);
  85 }
  86
  87 IMPL (stupid_STRCHR, 0)
  88 IMPL (simple_STRCHR, 0)
  89 IMPL (STRCHR, 1)
  90
  91 static int
  92 check_result (impl_t *impl, const CHAR *s, int c, const CHAR *exp_res)
  93 {
  94   CHAR *res = CALL (impl, s, c);
  95   if (res != exp_res)
  96     {
  97       error (0, 0, "Wrong result in function %s %#x %p %p", impl->name,
  98              c, res, exp_res);
  99       ret = 1;
 100       return -1;
 101     }
 102   return 0;
 103 }
 104
 105 static void
 106 do_one_test (impl_t *impl, const CHAR *s, int c, const CHAR *exp_res)
 107 {
 108   if (check_result (impl, s, c, exp_res) < 0)
 109     return;
 110
 111   if (HP_TIMING_AVAIL)
 112     {
 113       hp_timing_t start __attribute ((unused));
 114       hp_timing_t stop __attribute ((unused));
 115       hp_timing_t best_time = ~ (hp_timing_t) 0;
 116       size_t i;
 117
 118       for (i = 0; i < 32; ++i)
 119         {
 120           HP_TIMING_NOW (start);
 121           CALL (impl, s, c);
 122           HP_TIMING_NOW (stop);
 123           HP_TIMING_BEST (best_time, start, stop);
 124         }
 125
 126       printf ("\t%zd", (size_t) best_time);
 127     }
 128 }
 129
 130 static void
 131 do_test (size_t align, size_t pos, size_t len, int seek_char, int max_char)
 132 /* For wcschr: align here means align not in bytes,
 133    but in wchar_ts, in bytes it will equal to align * (sizeof (wchar_t))
 134    len for wcschr here isn't in bytes but it's number of wchar_t symbols.  */
 135 {
 136   size_t i;
 137   CHAR *result;
 138   CHAR *buf = (CHAR *) buf1;
 139   align &= 15;
 140   if ((align + len) * sizeof (CHAR) >= page_size)
 141     return;
 142
 143   for (i = 0; i < len; ++i)
 144     {
 145       buf[align + i] = 32 + 23 * i % max_char;
 146       if (buf[align + i] == seek_char)
 147         buf[align + i] = seek_char + 1;
 148       else if (buf[align + i] == 0)
 149         buf[align + i] = 1;
 150     }
 151   buf[align + len] = 0;
 152
 153   if (pos < len)
 154     {
 155       buf[align + pos] = seek_char;
 156       result = buf + align + pos;
 157     }
 158   else if (seek_char == 0)
 159     result = buf + align + len;
 160   else
 161     result = NULLRET (buf + align + len);
 162
 163   if (HP_TIMING_AVAIL)
 164     printf ("Length %4zd, alignment in bytes %2zd:",
 165             pos, align * sizeof (CHAR));
 166
 167   FOR_EACH_IMPL (impl, 0)
 168     do_one_test (impl, buf + align, seek_char, result);
 169
 170   if (HP_TIMING_AVAIL)
 171     putchar ('\n');
 172 }
 173
 174 static void
 175 do_random_tests (void)
 176 {
 177   size_t i, j, n, align, pos, len;
 178   int seek_char;
 179   CHAR *result;
 180   UCHAR *p = (UCHAR *) (buf1 + page_size - 512 * sizeof (CHAR));
 181
 182   for (n = 0; n < ITERATIONS; n++)
 183     {
 184       /* For wcschr: align here means align not in bytes, but in wchar_ts,
 185          in bytes it will equal to align * (sizeof (wchar_t)).  */
 186       align = random () & 15;
 187       pos = random () & 511;
 188       seek_char = random () & 255;
 189       if (pos + align >= 511)
 190         pos = 510 - align - (random () & 7);
 191       /* len for wcschr here isn't in bytes but it's number of wchar_t
 192          symbols.  */
 193       len = random () & 511;
 194       if ((pos == len && seek_char)
 195           || (pos > len && (random () & 1)))
 196         len = pos + 1 + (random () & 7);
 197       if (len + align >= 512)
 198         len = 511 - align - (random () & 7);
 199       if (pos == len && seek_char)
 200         len = pos + 1;
 201       j = (pos > len ? pos : len) + align + 64;
 202       if (j > 512)
 203         j = 512;
 204
 205       for (i = 0; i < j; i++)
 206         {
 207           if (i == pos + align)
 208             p[i] = seek_char;
 209           else if (i == len + align)
 210             p[i] = 0;
 211           else
 212             {
 213               p[i] = random () & 255;
 214               if (i < pos + align && p[i] == seek_char)
 215                 p[i] = seek_char + 13;
 216               if (i < len + align && !p[i])
 217                 {
 218                   p[i] = seek_char - 13;
 219                   if (!p[i])
 220                     p[i] = 140;
 221                 }
 222             }
 223         }
 224
 225       if (pos <= len)
 226         result = (CHAR *) (p + pos + align);
 227       else if (seek_char == 0)
 228         result = (CHAR *) (p + len + align);
 229       else
 230         result = NULLRET ((CHAR *) (p + len + align));
 231
 232       FOR_EACH_IMPL (impl, 1)
 233         if (CALL (impl, (CHAR *) (p + align), seek_char) != result)
 234           {
 235             error (0, 0, "Iteration %zd - wrong result in function \
 236                    %s (align in bytes: %zd, seek_char: %d, len: %zd, pos: %zd) %p != %p, p %p",
 237                    n, impl->name, align * sizeof (CHAR), seek_char, len, pos,
 238                    CALL (impl, (CHAR *) (p + align), seek_char), result, p);
 239             ret = 1;
 240           }
 241     }
 242 }
 243
 244 static void
 245 check1 (void)
 246 {
 247   char s[] __attribute__((aligned(16))) = "\xff";
 248   char c = '\xfe';
 249   char *exp_result = stupid_STRCHR (s, c);
 250
 251   FOR_EACH_IMPL (impl, 0)
 252     check_result (impl, s, c, exp_result);
 253 }
 254
 255 int
 256 test_main (void)
 257 {
 258   size_t i;
 259
 260   test_init ();
 261
 262   check1 ();
 263
 264   printf ("%20s", "");
 265   FOR_EACH_IMPL (impl, 0)
 266     printf ("\t%s", impl->name);
 267   putchar ('\n');
 268
 269   for (i = 1; i < 8; ++i)
 270     {
 271       do_test (0, 16 << i, 2048, SMALL_CHAR, MIDDLE_CHAR);
 272       do_test (i, 16 << i, 2048, SMALL_CHAR, MIDDLE_CHAR);
 273     }
 274
 275   for (i = 1; i < 8; ++i)
 276     {
 277       do_test (i, 64, 256, SMALL_CHAR, MIDDLE_CHAR);
 278       do_test (i, 64, 256, SMALL_CHAR, BIG_CHAR);
 279     }
 280
 281   for (i = 0; i < 32; ++i)
 282     {
 283       do_test (0, i, i + 1, SMALL_CHAR, MIDDLE_CHAR);
 284       do_test (0, i, i + 1, SMALL_CHAR, BIG_CHAR);
 285     }
 286
 287   for (i = 1; i < 8; ++i)
 288     {
 289       do_test (0, 16 << i, 2048, 0, MIDDLE_CHAR);
 290       do_test (i, 16 << i, 2048, 0, MIDDLE_CHAR);
 291     }
 292
 293   for (i = 1; i < 8; ++i)
 294     {
 295       do_test (i, 64, 256, 0, MIDDLE_CHAR);
 296       do_test (i, 64, 256, 0, BIG_CHAR);
 297     }
 298
 299   for (i = 0; i < 32; ++i)
 300     {
 301       do_test (0, i, i + 1, 0, MIDDLE_CHAR);
 302       do_test (0, i, i + 1, 0, BIG_CHAR);
 303     }
 304
 305   do_random_tests ();
 306   return ret;
 307 }
 308
 309 #include "../test-skeleton.c"